Westchester County is reacting to the deadly explosions near the finish line of the Boston Marathon today by increasing security throughout the county.

A county police spokesman said Westchester has deployed its aviation unit helicopter and its marine unit on the Hudson River. The county’s bomb squad is on standby and security has been increased at Westchester County Airport.

The helicopter is conducting aerial surveillance of critical infrastructure around the county.

“My heart goes out to the victims and their families of the horrific tragedy at the Boston Marathon. As a result of the events in Boston, Westchester County is on a heightened level of readiness,” said Westchester County Executive Robert P. Astorino. “I have ordered Westchester County Police to immediately take a number of precautionary actions including the deployment of the Aviation Unit helicopter to conduct aerial surveillance of critical infrastructure around the county and the Marine Unit to do the same along the Hudson River